2. The circumstances in which a report under section 15 of the Act is required are as follows:
(a)
an actual or probable discharge of oil, or a noxious liquid substance carried in bulk resulting or likely to result from damage to the ship or its equipment, or made or likely to be made for the purpose of securing the safety of a ship or saving life at sea;
(b)
an actual or probable discharge of a marine pollutant in packaged form from the ship; or
(c)
an actual discharge during the operation of the ship of oil or noxious liquid substance in excess of the quantity or instantaneous rate permitted under the relevant provisions of the Prevention of Pollution of the Sea (Oil) Regulations [Rg 1.] or the Prevention of Pollution of the Sea (Noxious Liquid Substances in Bulk) Regulations. [Rg 2.]